int main()
{
	int n,a,b,c,d,e,m;   //a??????b??????c??????d??????e?????,m??????

	cin>>n;                            //????
	a=n/10000;                         //?????

    b=(n-a*10000)/1000;                 //?????
	c=(n-a*10000-b*1000)/100;           //?????
	d=(n-a*10000-b*1000-c*100)/10;      //?????
	e=n%10;                              //?????
	if(a!=0)
	{
		m=e*10000+d*1000+c*100+b*10+a;
	}
	else 
		if(b!=0)
		{
			m=e*1000+d*100+c*10+b;
		}
		else
			if(c!=0)
			{
				m=e*100+d*10+c;
			}
			else
				if(d!=0)
				{
					m=e*10+d;
				}
				else
				{
					m=e;              //?????
				}
				cout<<m<<endl;        //???????
				return 0;
}



		

